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Chemistry 112

Chemistry 112. Molecular Compounds. Naming Binary Molecular Compounds. Composed of two nonmetals. Ions are not used because e- are not transferred. Nonmetals can combine with other nonmetals in many different ways. Ex. Carbon and oxygen

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Chemistry 112

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  1. Chemistry 112 Molecular Compounds

  2. Naming Binary Molecular Compounds • Composed of two nonmetals. • Ions are not used because e- are not transferred. • Nonmetals can combine with other nonmetals in many different ways. • Ex. Carbon and oxygen • Prefixes are used in naming binary molecular compounds. • Table 9.4, p. 269 • They identify the number of atoms present.

  3. Some Rules to Remember… • The prefix mono- only applies to the second nonmetal. • The suffix of the second nonmetal is changed to –ide. • Do not reduce to the lowest common ratio. Leave the subscripts alone. • Questions 22-24, p. 270

  4. Acids and Bases • Acids are ionic compounds with unique properties. • There is more than one way to define an acid but for now, it will be identified as a compound that contains one or more hydrogen atoms and produces hydrogen ions (H+) when dissolved in water. • For the most part, acids assume the form HnX • H is the hydrogen that has to be present • n is the subscript associated with the charge of the anion or the hydrogen ions combined with the particular anion • X is the anion present

  5. Naming Acids • Classical • When the name of the anion ends in –ide, the acid name begins with the prefix hydro- and the suffix of the anion is changed to –ic followed by the word acid. • When the anion name ends in –ite, the acid name is the stem of the anion with the suffix –ous followed by the word acid. • When the anion ends in –ate, the acid name is the stem of the anion with the suffix –ic followed by the word acid. • Modern naming tells you to identify the state of matter, then the word hydrogen and then the name of the anion.

  6. Acids and Bases – writing formulas • Rely on the name of the formula to guide you with the rules. • Hydrogen ions have a charge of 1+. • The anions charge is used as well. • Use the crisscross method to determine the overall formula. • A base is an ionic compound that produces hydroxide ions in water. • They are named the same way as ionic compounds. • Questions 29-32, p. 273.

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